#include <stdlib.h>
#include <stdio.h>
#include <time.h>

int main() {
	//randomize();
	int i, l, c;
	for (i = 0; i < 36; ++i) {
		srand((unsigned)time(0));
		printf("\n");
		for (l = 0; l < 8; ++l) {
			switch(rand()%3){
				case 0:;c='A'+rand()%26;break;
				case 1:;c='a'+rand()%26;break;
				case 2:;c='0'+rand()%10;break;
			}
			printf("%c",c);
		}
		printf("\n");
		sleep(2);
	}
}
